Direct lighting fixture



Feb. 1, 1938. c. DOANE DIRECT LIGHTING FIXTURE Filed Feb. 6, 1936INVENTOR ZERO) C. Don/vs ATTORNEY Patented Feb. 1, 1938 UNITED STATES2,107,028 DIRECT LIGHTING FIXTURE Leroy 0. Duane, Meriden, Conn,assignor to The Miller Company, Meriden, Conn., a corporation oiConnecticut Application February 6, 1936, Serial No. 62,601

9 Claims.

The present invention relates to direct lighting fixtures and morespecially to direct lighting fixtures employing two light sources.

The present invention contemplates a lighting fixture adapted to useincandescent lamps and mercury vapor lamps, both burning in pendantpositions.

As the heat generated by the operation of 1 all these lamps isconsiderable, it has been found necessary to take special precautions toproperly cool the lamp sockets and the upper part of the vapor lamp soas to secure proper operation for the vapor lamp.

The present invention therefore provides a holder for the lamp bulbs andsockets having suitable ventilation features whereby the heated air isdissipatedwithout causing an undesirable rise in temperature of theholder and parts carried thereby.

In effecting the control of the heated air rising from the lamp bulbs,the present invention makes use of a bafile apertured to receive thelamp bulbs and held in a holder in such a way as to permit the hot airto spill around the edges of the baflie and pass into the upper part ofthe holder, this part being skeletonized so that the hot air readilyescapes to the outside atmosphere. The accompanying drawing shows, forpurposes of illustrating the present invention one of the manyembodiments in which the invention may take form, it being understoodthat the drawing is illustrative of the invention rather than limitingthe same.

In the drawing:

Fig. 1 is a vertical sectional view of a direct lighting fixture on theline l-l of Figs. 2 and 3, with parts in elevation and parts brokenaway;

Fig. 2 is a sectional view on the broken line 2-2 of Fig. l, with partsin elevation;

Fig. 3 is a section taken on the line 33 of Fig. 1 looking in thedirection of the arrows;

Fig. 4 is a perspective view of the holder and bulbs, the enclosurebeing omitted; and

Fig. 5 is a fragmentary vertical section on the line 5-5 of Fig. 3. r

The fixture shown herein is adapted to be supported in a pendantposition by a pipe, conduit or other support H). The holder 55 in Fig.2. The holder is provided with down- I I is. threaded onto this pipe andsupports the fixture.

wardly extending straps or ribs l6, I1, I 8, all of which support alower annular large diameter skirt portion IS. The holder is preferablyin the form of a casting.

A central pendant lamp socket 20 is secured in the upper part of theholder and adapted to be connected by wires indicated at 2| with acurrent source. This socket supports a pendant mercury vapor lamp 22whose electrodes are indicated at 23 and 24. The fiat portion ll of theholder supports three lamp sockets 25 which carry incandescent lampbulbs indicated at 26.

The incandescent lamp sockets 25 are connected to wires 21 passingthrough an annular wireway, as indicated at the right of Fig. 1. Thesewires are held in place by narrow segments 28 secured to the lower faceof the holder by screws 2 9. The ends of the segments are spaced, asindicated at 30, Fig. 2, to facilitate the wiring, and the ends of thesegments are held in place by the lamp sockets.

The upper portion of the current supply wires for the incandescent lampsis indicated at 3|. They pass down through a channel-shaped rib 32 andare held in place by a cover indicated at 33. The ends of this cover arebent, as shown in the drawing, and the cover is held in place bythesockets.

The vertical ribs l8 are made thick, as indicated at the left of Fig. 1,while the ribs l6 and I! are thinner. These thick ribs provide inwardlyextending lugs 34 which are tapped to receive screws 35. These screwssupport a baflle plate 36. The outer edge of this baflie plate isindicated at 31, and it will be apparent from the drawing that the edgeof the plate is spaced from the walls of the holder so as to formchannels or vents for the escape of the heated air.

The straps iii are apertured, as indicated at 40, to receive the upperends of hook members M. The lower ends of these hook members areindicated at 42, and they are adjustably secured in place by thumbscrews indicated at 43. The peripheral flange on the baflle plate 36 isnotched to accommodate these screws.

The straps 4| form a convenient shade support for securing any form ofenclosing shade about the bulbs. This shade may be merely an all-metalreflector of any desired shape, or may be combined diffusing glassenclosing globe, as indicated at 45 and metal reflector indicated at 46.Whatever form of enclosure is employed, it has a tendency to confine theheat generated by the lamps and to make it necessary to ventilate theholder. The heated air will pass up through minimum heating of thesockets, wires and terminals and of the upper part of the mercury vaporlamp. The lamp can be kept cool enough to properly function.

It is obvious that the invention may be embodied in many forms andconstructions within the scope of the claims, and I wish it to beunderstood that the particular form shown is but one of the many forms.Various modifications and changes being possible, I do not otherwiselimit myself in any way with respect thereto.

What is claimed is:

l. A direct lighting fixture comprising a central downwardly openinglamp socket, a pendant mercury vapor lamp carried therein, a pluralityof downwardly opening lamp sockets circumferentially disposed below thecentral socket, incandescent lamps in the latter mentioned sockets, acommon support for all the sockets, said support being in the form of askeletonized holder to provide ventilation about the sockets, a lampenclosing member carried by the holder and disposed about the lamps tocause air heated thereby to pass upwardly through the member and theholder, and a baille plate mounted below the sockets and apertured toreceive the upper portion of the lamps and having its edge spaced fromthe holder to provide a peripheral ventilation space whereby the heatedair within the member is diverted from the upper end of the vapor lampand its supporting socket, andpasses out through the holes of theskeletonized holder.

2. In a direct lighting fixture, a downwardly opening central socket, aplurality of downwardly opening sockets spaced circumferentially outsideand below the central socket, an annular downwardly opening socketholder to which all the sockets are secured, the holder beingskeletonized to afford free escape of heated air and having a skirtabout its lower edge, lamp bulbs in the sockets, a partition wall acrossthe holder below the sockets and above the skirt, the wall beingapertured to receive the upper portions of the lamp bulbs and of smallerdiameter than the holder to facilitate escape of air upwardly betweenthe edge of the wall and the holders, and a lamp enclosing membersecured to the skirtof the holder.

3. In a direct lighting fixture,-a pendant mercury vapor lamp, asupporting socket, a socket holder, a horizontal plate apertured toreceive the vapor lamp and disposed above the upper electrode of thevapor lamp, a plurality of circumferentially disposed lamp socketscarried by the holder below the first socket and above the plate,incandescent lamps therein, the necks of these lamps passing throughapertures in the plate, the peripheral edge of the plate being spacedfrom the lower portion of the holder to facilitate the e of heated airup betweui the edge of the plate and the holder, the holder beingprovided with large ventilation apertures above the edge of the plate tofacilitate escape of heated air from the fixture, and a lamp enclosingmember supported from the holder.

4. In a direct lighting fixture, a holder having an upper small diameterportion and a lower large diameter .portion, both portions beingprovided with large ventilation openings to allow free fiow "of air, acentral downwardly opening'socket in the upper portion, aplurality ofdownwardly opening sockets in the lower portion, a partition wallsupported below the sockets and apertured for lamp bulbs carried in. thesockets, a mercury vapor lamp in the first socket, incandescent lamps inthe other sockets, the edge of the partition wall \being spaced from theholder to provide peripheral air vents.

5. In a lighting fixture, a socket holder having upper, intermediate andlower annular portions interconnected by spacing libs which providelaterally opening ventilation openings, a central socket secured to theupper portion, a plurality of sockets secured to the intermediateportion, an apertured plate secured to the lower portion with its edgesspaced therefrom to provide peripheral air vents, and socket supportedlamps projecting through the apertures in the plate.

6. A lighting fixture such as claimed in claim 5. wherein theintermediate portion of the holder is flat and provided with ventilationapertures.

7. A lighting fixture such as claimed in claim 5, wherein the holder hasan annular wire receiving channel for the lower sockets and a cover forsaid channel. v

8. In apendant lighting fixture, a holder having an annular shadereceiving skirt, internally disposed lugs spaced above the lower edge ofthe skirt, an annular baffle plate fitting the lugs and spaced from theholder walls to afiord' vents, means to secure the baifle plate inplace, shade supports carried by the holder, sockets above the plate,and bulbs in the sockets projecting through apertures in .the plate, theholder being skele, tonized above the plate to prevent hot airaccumulating about the sockets.

- 9. In a lighting fixture, a downwardly opening stepped, bell shapedholder having an upper small diameter portion, a central socket carriedthereby, an intermediate, fiat portion connected to the

